Article History
Received: 19 June 2019
Accepted: 5 July 2019
First Online: 12 July 2019
Compliance with ethical standards
: The authors have been compliant with all applicable ethical standards in the publication of this manuscript.
: The authors declare that they have no conflict of interest.
: IRB approval was obtained for this study. All patients included signed consent forms for the use of non-identifying medical information in medical research, including this study. For this type of study, formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.